Inventor · disambiguated record
Robert H. Welker
Also filed as: WELKER ROBERT H
36 granted patents·1 pending application·748 citations·filing 1974–2009
98Inventor score
Top patents by PatentIndex Score
37 records- 0192US4631967AAutomatic insertion deviceWELKER ENG·Filed 1985·Granted Dec 30, 1986·87 cites·32 claims
- 0288US4177676ASensor positioning apparatusWELKER ROBERT H·Filed 1978·Granted Dec 11, 1979·42 cites·7 claims
- 0387US4346611AInsertion regulator for pressurized pipelinesWELKER ROBERT H·Filed 1980·Granted Aug 31, 1982·52 cites·13 claims
- 0485US5307830AFlow distribution method and apparatus reducing downstream turbulenceWELKER ENG·Filed 1993·Granted May 3, 1994·50 cites·20 claims
- 0583US4557151ASampler incorporating pressure balanced check valveWELKER ENG·Filed 1983·Granted Dec 10, 1985·41 cites·6 claims
- 0683US4525127AFluid pump mechanismWELKER ENG·Filed 1981·Granted Jun 25, 1985·42 cites·9 claims
- 0780US4172670ALiquid sample collection apparatusWELKER ROBERT H·Filed 1978·Granted Oct 30, 1979·29 cites·8 claims
- 0879US5730416AMethod and apparatus for quieting turbulence in a gas flow line valveWELKER ENG·Filed 1995·Granted Mar 24, 1998·32 cites·7 claims
- 0976US4387592AProbe insertion apparatusWELKER ENG·Filed 1981·Granted Jun 14, 1983·27 cites·9 claims
- 1073US5769388AFlow diffuser and valveWELKER ENG·Filed 1997·Granted Jun 23, 1998·31 cites·14 claims
- 1171US6439267B2Adjustable flow diffuserWELKER ENG·Filed 2001·Granted Aug 27, 2002·16 cites·21 claims
- 1270US3945770AHigh pressure pumpWELKER ROBERT H·Filed 1974·Granted Mar 23, 1976·21 cites·9 claims
- 1368US6289934B1Flow diffuserWELKER ENG·Filed 1999·Granted Sep 18, 2001·26 cites·18 claims
- 1467US6250330B1Diaphragm regulator with removable diffuserWELKER ENG·Filed 1999·Granted Jun 26, 2001·25 cites·6 claims
- 1561US5924673AMethod and apparatus for quieting turbulence in a gas flow line valveWELKER ENG·Filed 1998·Granted Jul 20, 1999·17 cites·11 claims
- 1660US4850669AExplosion-proof optical fiber connector for a light sourceWELKER ENG·Filed 1988·Granted Jul 25, 1989·20 cites·6 claims
- 1760US4403518ASampler apparatusWELKER ENG·Filed 1981·Granted Sep 13, 1983·17 cites·8 claims
- 1856US4351510AFlow regulator assemblyWELKER ROBERT H·Filed 1980·Granted Sep 28, 1982·16 cites·4 claims
- 1954US5936168ADual injector cylinder automatic insertion device for use with high pressure pipelinesFiled 1995·Granted Aug 10, 1999·19 cites·11 claims
- 2051US4463599AFree water volume analyzerWELKER ENG·Filed 1983·Granted Aug 7, 1984·17 cites·10 claims
- 2151US4315616ADump valveWELKER ROBERT H·Filed 1980·Granted Feb 16, 1982·14 cites·10 claims
- 2250US7493914B2Newtonian thrust cowl arrayWELKER INC·Filed 2005·Granted Feb 24, 2009·2 cites·7 claims
- 2350US4403519ASample collection apparatusWELKER ENG·Filed 1981·Granted Sep 13, 1983·14 cites·5 claims
- 2449US4440032ASampler incorporating a purge systemWELKER ENG·Filed 1982·Granted Apr 3, 1984·16 cites·7 claims
- 2548US5454640AFlow diffuser for redistributing stratified liquids in a pipelineFiled 1994·Granted Oct 3, 1995·14 cites·15 claims
- 2647US4777567AOptical inspection apparatusWELKER ENG·Filed 1986·Granted Oct 11, 1988·12 cites·11 claims
- 2747US4463603AVolume analyzer for crude oil sampling system including bite checking apparatusWELKER ENG·Filed 1983·Granted Aug 7, 1984·10 cites·11 claims
- 2844US2009137165A1Newtonian thrust cowl arrayWELKER INC·Filed 2009·Application pending·0 cites
- 2942US4046300AScored glass bracket breaking apparatusLIBBEY OWENS FORD CO·Filed 1976·Granted Sep 6, 1977·5 cites·8 claims
- 3040US4470773AResilient chamber fluid sampler having vacuum breaker apparatusWALKER ENGINEERING COMPANY·Filed 1982·Granted Sep 11, 1984·8 cites·8 claims
- 3138US4678290AApparatus for visual inspection of closed machineryWELKER ENG·Filed 1985·Granted Jul 7, 1987·7 cites·17 claims
- 3236US4908567APower supply system for an optical inspection apparatusWELKER ENG·Filed 1989·Granted Mar 13, 1990·6 cites·2 claims
- 3335US4395016AAxial flow regulator improvements including restrictorWELKER ENG·Filed 1981·Granted Jul 26, 1983·5 cites·4 claims
- 3435US4354661AConstant velocity diffuserWELKER ROBERT H·Filed 1980·Granted Oct 19, 1982·5 cites·9 claims
- 3534US4224629ADisc chart paper with reinforced separating edgeWELKER ROBERT H·Filed 1979·Granted Sep 23, 1980·1 cites·10 claims
- 3631US4830334AResilient plug construction for a flow regulator incorporating stress limiting meansWELKER ROBERT H·Filed 1988·Granted May 16, 1989·2 cites·13 claims
- 3730US4442999AReinforced plug for flow regulatorsWELKER ENG·Filed 1982·Granted Apr 17, 1984·0 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →